The solution to math problem 6721 is 84. This can be found by taking the square root of 6721, which equals 82. Then, by adding 2 to 82, we get the final answer of 84. **

A fitness smartwatch typically tracks various health and fitness metrics such as heart rate, steps taken, distance traveled, calories burned, and sleep patterns. Some advanced models may also monitor blood oxygen levels, stress levels, and provide guided workouts. Additionally, fitness smartwatches often have GPS capabilities to track outdoor activities like running or cycling. **

MX may not start due to a variety of reasons, such as a dead battery, a faulty ignition system, a clogged fuel filter, or a problem with the engine itself. It could also be due to issues with the fuel pump, spark plugs, or the electrical system. Additionally, if the vehicle is not in park or neutral, the MX may not start. It is important to troubleshoot and diagnose the specific issue in order to determine why MX is not starting. **

To improve your endurance in long-distance running, you can incorporate a variety of training techniques into your routine. This can include regular long runs to build up your stamina, interval training to improve your speed and endurance, and hill workouts to strengthen your leg muscles. Additionally, make sure to include cross-training activities such as cycling or swimming to reduce the risk of injury and improve overall fitness. Lastly, focus on proper nutrition and hydration to support your training and recovery. Consistency and gradual progression in your training will also be key to improving your endurance in long-distance running. **

The fairness of an 800m running track depends on various factors such as the quality of the track surface, the conditions on race day, and the athletes' individual abilities. In general, the 800m track is a standard distance for middle-distance running events and is used in competitions worldwide. While some athletes may prefer longer or shorter distances, the 800m track itself is not inherently unfair. It is up to the athletes to train and prepare for the specific demands of the 800m race. **

The main difference between Cherry MX Red and Cherry MX Silver switches is the actuation point and the force required to actuate the keys. Cherry MX Red switches have an actuation force of 45g and a linear actuation, meaning there is no tactile bump or audible click when the key is pressed. On the other hand, Cherry MX Silver switches have a shorter actuation point of 1.2mm and a slightly higher actuation force of 45g, making them faster and more responsive for gaming. Overall, Cherry MX Silver switches are designed to be faster and more sensitive than Cherry MX Red switches. **

You can try looking for curtain rods or tracks at home improvement stores like Home Depot, Lowe's, or IKEA. These stores often carry a variety of curtain hardware options at affordable prices. You can also check online retailers like Amazon or eBay for longer curtain rods or tracks at competitive prices. Additionally, you may want to consider checking out discount stores or thrift shops for potential deals on curtain rods or tracks. **

You can try looking for affordable curtain rods or tracks at home improvement stores like Home Depot, Lowe's, or IKEA. Another option is to check online retailers such as Amazon, Wayfair, or Walmart for budget-friendly options. Additionally, you may also find good deals at discount stores like Target or Bed Bath & Beyond. **